BECKHOFF AX5805 Installation - Manual (Page 93)

Product description
AX5805 91
3.7.5 Step 5: Implementation of an EMERGENCY STOP button
The emergency stop function could be implemented as follows. When the Emergency Stop is pressed,
the drive must be disabled. In this case, the drive stops the motor via the functional (non-safety) STOP ramp.
After the preconfigured time (ESTOP delayed output) has elapsed, the STO function is activated and torque
is removed from the motor.
The delayed output signal of the ESTOP is linked to all of the functions. Since the STO function has the
highest priority, all of the other safety functions are disabled in the normal operating mode, even after the
delayed output signal is linked to them.
WARNING
STOP ramp of the AX5000 servo drive
The STOP ramp of the AX5000 servo drive is purely functional and is not designed to be a
safety feature. In the event of a malfunction, the motors coast to a stop or may even be
accelerated. In order to avoid these dangerous situations and movements, external safety
mechanisms are to be provided by the user.
Figure 46: AX5805 STO link